Stable Polyurethane(稳定的聚氨酯)研究综述
Stable Polyurethane 稳定的聚氨酯 - The thermostable polyurethane is a material used in the modeling sector and is currently replacing structural parts in control models of the automobile and aeronautics sector, for its ease of machining, in addition to providing good mechanical properties. [1] Thus, aims of this work were (i) to modify the surface of soft biostable polyurethane-based model implants (TPCU and TSiPCU) with high-molecular weight hyaluronic acid (HA) using an optimized multistep strategy of immobilization, and (ii) to evaluate bioactivity of the modified TPCUs in vitro. [2] Strategies to design biostable polyurethanes are briefly reviewed to understand the effect of the polyurethane chemical structure on mechanical properties and resistance to degradation based on reported in vitro and in vivo data. [3] SiPUU with PHMO-MDI-PHMO and PHMO-IPDI-PHMO linked macrodiols showed enhanced creep resistance and recovery when compared with a commercial biostable polyurethane, Elast-Eon™ 2A. [4] A castable polyurethane (PUR) with soft segment made by polytetrahydrofuran polyol (or polytretramethylene ether glycol = PTMEG) derived from renewable sources was used as polymer matrix to prepare neutron shields. [5]耐热聚氨酯是一种用于建模领域的材料，目前正在取代汽车和航空领域控制模型中的结构部件，因为它易于加工，并且具有良好的机械性能。 [1] 因此，这项工作的目的是 (i) 使用优化的多步固定策略，用高分子量透明质酸 (HA) 修饰基于软生物稳定聚氨酯的模型植入物（TPCU 和 TSiPCU）的表面，以及 (ii)在体外评估修饰的 TPCUs 的生物活性。 [2] 根据报告的体外和体内数据，简要回顾了设计生物稳定聚氨酯的策略，以了解聚氨酯化学结构对机械性能和抗降解性的影响。 [3] 与商业生物稳定聚氨酯 Elast-Eon™ 2A 相比，具有 PHMO-MDI-PHMO 和 PHMO-IPDI-PHMO 连接的大二醇的 SiPUU 显示出增强的抗蠕变性和恢复性。 [4] 以可再生资源的聚四氢呋喃多元醇（或聚四亚甲基醚二醇 = PTMEG）为原料的软链段浇注聚氨酯（PUR）作为聚合物基体制备中子屏蔽层。 [5]